Boyle, Robert, New experiments physico-mechanicall, touching the spring of the air and its effects, 1660

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              <s>
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              to think by ſeveral Circumſtances. </s>
              <s>For
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              when an eminent Mathematician, and ex­
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              cellent Experimenter, had taken great
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              pains and ſpent much time in accuratly fil­
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              ling up a Tube of Mercury, we found
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              that yet there remain'd ſtore of inconſpi­
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              cuous bubbles, by inverting the Tube,
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              letting the Quick-ſilver fall to its wonted
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              heighth; and by approaching (by de­
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              grees) a red hot Iron to the out-ſide of the
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              Tube, over againſt the upper part of the
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              Mercurial Cylinder, for hereby the little
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              unheeded bubbles, being mightily expan­
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              ded, aſcended in ſuch numbers, and ſo faſt
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              to the deſerted ſpace, that the upper part
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              of the Quick-ſilver ſeem'd, to our wonder,
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              to boyl. </s>
              <s>We further obſerv'd, That in
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              the tryals of the
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              Torricellian
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              Experiment
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              we have ſeen made by others, and (one
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              excepted) all our own, we never found that
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              upon the inclining of the Tube the Quick­
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              ſilver would fully reach to the very top of
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              the ſeal'd end: which argued, that there
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              was ſome Air retreated thither that kept
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              the Mercury out of the unrepleniſh'd
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              ſpace. </s>
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            <p type="main">
              <s>If Your Lordſhip ſhould now demand
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              what are the beſt expedients to hinder the
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              intruſion of the Air in this Experiment; </s>
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          </chap>
        </body>
      </text>
    </archimedes>
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